fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / net / sunrpc / auth_gss / gss_krb5_seal.c

diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index afeeb87..d0bb506 100644 (file)
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -70,107 +70,55 @@
 # define RPCDBG_FACILITY        RPCDBG_AUTH
 #endif
 
-static inline int
-gss_krb5_padding(int blocksize, int length) {
-       /* Most of the code is block-size independent but in practice we
-        * use only 8: */
-       BUG_ON(blocksize != 8);
-       return 8 - (length & 7);
-}
+DEFINE_SPINLOCK(krb5_seq_lock);
 
 u32
-krb5_make_token(struct krb5_ctx *ctx, int qop_req,
-                  struct xdr_buf *text, struct xdr_netobj *token,
-                  int toktype)
+gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text,
+               struct xdr_netobj *token)
 {
-       s32                     checksum_type;
-       struct xdr_netobj       md5cksum = {.len = 0, .data = NULL};
-       int                     blocksize = 0, tmsglen;
+       struct krb5_ctx         *ctx = gss_ctx->internal_ctx_id;
+       char                    cksumdata[16];
+       struct xdr_netobj       md5cksum = {.len = 0, .data = cksumdata};
        unsigned char           *ptr, *krb5_hdr, *msg_start;
        s32                     now;
+       u32                     seq_send;
 
        dprintk("RPC:     gss_krb5_seal\n");
 
        now = get_seconds();
 
-       if (qop_req != 0)
-               goto out_err;
-
-       switch (ctx->signalg) {
-               case SGN_ALG_DES_MAC_MD5:
-                       checksum_type = CKSUMTYPE_RSA_MD5;
-                       break;
-               default:
-                       dprintk("RPC:      gss_krb5_seal: ctx->signalg %d not"
-                               " supported\n", ctx->signalg);
-                       goto out_err;
-       }
-       if (ctx->sealalg != SEAL_ALG_NONE && ctx->sealalg != SEAL_ALG_DES) {
-               dprintk("RPC:      gss_krb5_seal: ctx->sealalg %d not supported\n",
-                       ctx->sealalg);
-               goto out_err;
-       }
-
-       if (toktype == KG_TOK_WRAP_MSG) {
-               blocksize = crypto_tfm_alg_blocksize(ctx->enc);
-               tmsglen = blocksize + text->len
-                       + gss_krb5_padding(blocksize, blocksize + text->len);
-       } else {
-               tmsglen = 0;
-       }
-
-       token->len = g_token_size(&ctx->mech_used, 22 + tmsglen);
+       token->len = g_token_size(&ctx->mech_used, 22);
 
        ptr = token->data;
-       g_make_token_header(&ctx->mech_used, 22 + tmsglen, &ptr);
+       g_make_token_header(&ctx->mech_used, 22, &ptr);
 
-       *ptr++ = (unsigned char) ((toktype>>8)&0xff);
-       *ptr++ = (unsigned char) (toktype&0xff);
+       *ptr++ = (unsigned char) ((KG_TOK_MIC_MSG>>8)&0xff);
+       *ptr++ = (unsigned char) (KG_TOK_MIC_MSG&0xff);
 
        /* ptr now at byte 2 of header described in rfc 1964, section 1.2.1: */
        krb5_hdr = ptr - 2;
        msg_start = krb5_hdr + 24;
 
-       *(u16 *)(krb5_hdr + 2) = htons(ctx->signalg);
+       *(__be16 *)(krb5_hdr + 2) = htons(SGN_ALG_DES_MAC_MD5);
        memset(krb5_hdr + 4, 0xff, 4);
-       if (toktype == KG_TOK_WRAP_MSG)
-               *(u16 *)(krb5_hdr + 4) = htons(ctx->sealalg);
-
-       if (toktype == KG_TOK_WRAP_MSG) {
-               /* XXX removing support for now */
-               goto out_err;
-       } else { /* Sign only.  */
-               if (make_checksum(checksum_type, krb5_hdr, 8, text,
-                                      &md5cksum))
-                       goto out_err;
-       }
-
-       switch (ctx->signalg) {
-       case SGN_ALG_DES_MAC_MD5:
-               if (krb5_encrypt(ctx->seq, NULL, md5cksum.data,
-                                 md5cksum.data, md5cksum.len))
-                       goto out_err;
-               memcpy(krb5_hdr + 16,
-                      md5cksum.data + md5cksum.len - KRB5_CKSUM_LENGTH,
-                      KRB5_CKSUM_LENGTH);
-
-               dprintk("RPC:      make_seal_token: cksum data: \n");
-               print_hexl((u32 *) (krb5_hdr + 16), KRB5_CKSUM_LENGTH, 0);
-               break;
-       default:
-               BUG();
-       }
-
-       kfree(md5cksum.data);
-
-       if ((krb5_make_seq_num(ctx->seq, ctx->initiate ? 0 : 0xff,
-                              ctx->seq_send, krb5_hdr + 16, krb5_hdr + 8)))
-               goto out_err;
-
-       ctx->seq_send++;
-
-       return ((ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE);
-out_err:
-       if (md5cksum.data) kfree(md5cksum.data);
-       return GSS_S_FAILURE;
+
+       if (make_checksum("md5", krb5_hdr, 8, text, 0, &md5cksum))
+               return GSS_S_FAILURE;
+
+       if (krb5_encrypt(ctx->seq, NULL, md5cksum.data,
+                         md5cksum.data, md5cksum.len))
+               return GSS_S_FAILURE;
+
+       memcpy(krb5_hdr + 16, md5cksum.data + md5cksum.len - KRB5_CKSUM_LENGTH,
+              KRB5_CKSUM_LENGTH);
+
+       spin_lock(&krb5_seq_lock);
+       seq_send = ctx->seq_send++;
+       spin_unlock(&krb5_seq_lock);
+
+       if (krb5_make_seq_num(ctx->seq, ctx->initiate ? 0 : 0xff,
+                              ctx->seq_send, krb5_hdr + 16, krb5_hdr + 8))
+               return GSS_S_FAILURE;
+
+       return (ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
 }